Figure 6. Laser confocal image of particles on a filter. The particles viewed in incident light are indicated in dark gray with light gray speckles. (Color image available in PDF format on the volume CD-ROM shows these particles as green.) Areas of fluorescence due to Syto-59 are indicated by arrows and appear here as an intermediate gray. (Color image available on the volume CD-ROM shows these areas in red.) Some particles have areas of intense fluorescence which are likely to be caused by groups of bacteria. Most particles also have regions of dispersed fluorescence where each fluorescing spot is 1-2 µm.

Figure 6. Laser confocal image of particles on a filter. The particles viewed in incident light are indicated in dark gray with light gray (green) speckles. Areas of fluorescence due to Syto-59 are indicated by arrows and appear here as an intermediate gray (red). Some particles have areas of intense fluorescence which are likely to be caused by groups of bacteria. Most particles also have regions of dispersed fluorescence where each fluorescing spot is 1-2 µm.